mackey58 Posted September 3, 2018 Share Posted September 3, 2018 Hey folks. We have an 05 granite ai 400 the other day the temp gauge climbed to 210 and no clutch fan came on didn't hear or feel it kick in I babied it in and I could spin the clutch fuse is good could it be that air/ electric fitting on the firewall or us the clutch shot heard it kick on earlier that day but it didn't come on load like normal Quote Link to comment Share on other sites More sharing options...
steeler Posted September 4, 2018 Share Posted September 4, 2018 Depends what type of fan drive you have. I would say you probably have a Horton that locks the fan when there is no air to it. If I have one that isn't kicking in properly for me the easiest way to test the fan itself is to remove the air line that goes to the fan drive. That will lock it in and you shouldn't be able to spin the fan. If it's a fan drive that locks on with air pressure to it, then I take the air line off and shoot air to the fan manually and see if it locks. I would suspect the fan drive is probably the culprit. Quote Link to comment Share on other sites More sharing options...
mackey58 Posted September 4, 2018 Author Share Posted September 4, 2018 Ok thanks. Before when the truck was out of air it would be on till it hit 100 lbs now if it's out of air nothing Quote Link to comment Share on other sites More sharing options...
steeler Posted September 4, 2018 Share Posted September 4, 2018 Yup your fan drive is bad then. Check into the Horton 2 speed drives for a replacement unless yours already has it. It will extend the life of your next one 1 Quote Link to comment Share on other sites More sharing options...
mackey58 Posted September 8, 2018 Author Share Posted September 8, 2018 Wasn't that bad of job to change it new fan clutch new fan new belts they were getting iffy worst part was ordering the parts from m and k summit il had one shipped it to joliet il they couldn't fine it then there computers went down and couldn't sell it till they were up w t f and we have an account there Quote Link to comment Share on other sites More sharing options...
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